You have 160 yards of fencing material. if you want to construct a rectangular pen whose width is between 10 and 20 yards, inclusive, what is the longest that such a pen can be, in yards?

70 yards

Step-by-step explanation:

we know that

The perimeter of the rectangular pen is equal to

we have

The width is between 10 and 20 yards inclusive

we know that

The longest pen will be for the smaller value of W

so

For W=10 yd

substitute in the equation of perimeter

solve for L

answer: 4 (:

step-by-step explanation:

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of